🌐EnglishEnglishDeutschEspañolFrançaisItalianoРусский한국어日本語EntityQ4493388· pop 5· linked from 53 articlesfundamental classhomology class associated to an oriented closed manifoldAvailable in 5 languagesDeutsch日本語Русский한국어via Wikidata sitelinks · CC0ConnectionsmathematicsEntityInternational Standard Book NumberEntityCategoriesAlgebraic topology